Question

question 10 of 10 what is the measure of $widehat{ar}$ in $odot o$ below? a. 38° b. 218° c. 322° d. 142°

Explanation:

Step1: Recall arc - central angle relationship

The measure of an arc is equal to the measure of its central angle when the arc is subtended by a central angle in a circle.

Step2: Identify the central angle

The central angle corresponding to arc $\widehat{AR}$ is $\angle AOR = 142^{\circ}$. So the measure of arc $\widehat{AR}$ is also $142^{\circ}$.

Answer:

D. $142^{\circ}$